2007CBET.1102....1B

Further to CBETs 611 and 1098, B. Bassett, South African Astronomical Observatory; A. Becker, University of Washington (UW); D. Bizyaev and H. Brewington, Apache Point Observatory (APO); C. Choi, Seoul National University (SNU); D. Cinabro, Wayne State University (WSU); C. D'Andrea, University of Pennsylvania (Penn); J. Dembicky, APO; D. L. DePoy, Ohio State University (OSU); B. Dilday, University of Chicago (UC); M. Doi, University of Tokyo (UoT); J. Eastman, OSU; J. Frieman, Fermilab and UC; P. Garnavich, University of Notre Dame; A. Goobar, Stockholm University; C. Hogan, UW; J. Holtzman, New Mexico State University; M. Im, SNU; S. Jha, Rutgers University; R. Kessler, UC; B. Ketzeback, APO; K. Konishi, UoT; J. Krzesinski, APO; H. Lampeitl, University of Portsmouth (UP); G. Leloudas, Dark Cosmology Centre (DCC), University of Copenhagen; D. Long, O. Malanushenko, and V. Malanushenko, APO; J. Marriner, Fermilab; R. McMillan, APO; G. Miknaitis, Fermilab; T. Morokuma, National Astronomical Observatory of Japan; J. Mosher, Penn; R. Nichol, UP; D. Oravetz and K. Pan, APO; L. Ostman, Stockholm University; J. L. Prieto, OSU; M. Richmond, Rochester Institute of Technology; A. Riess, Space Telescope Science Institute; R. Romani, Stanford University (SU); M. Sako, Penn; D. Schneider, Pennsylvania State University; A. Simmons, APO; M. Smith, UP; S. Snedden, APO; J. Sollerman and M. Stritzinger, DCC; N. Takanashi and K. Tokita, UoT; M. F. Taylor, WSU; K. van der Heyden, University of Cape Town; S. Watters, APO; N. Yasuda, UoT; C. Wheeler, University of Texas; and C. Zheng, SU, on behalf of the Sloan Digital Sky Survey II collaboration, report the discovery of thirty-seven supernovae on g, r, and i images taken with the SDSS 2.5-m telescope at APO by the SDSS observing team. L. Watson (OSU), J. Prieto, and C. Zheng have reported on confirming spectroscopy of 2007lg, 2007li, 2007ll, 2007lt, 2007lv, 2007ly, 2007ma, 2007mc, 2007md, 2007mh, 2007mi, 2007mj, and 2007lx obtained with the Hiltner 2.4-m telescope on Oct. 10-12 UT. P. Garnavich has reported on confirming spectroscopy of 2007lj, 2007ln, 2007lo, 2007lp, 2007lz, 2007mb, 2007mg, and 2007mm obtained on the Kitt Peak National Observatory 4-m telescope on Oct. 10 and 11. A. V. Filippenko, J. M. Silverman, R. J. Foley, and M. Modjaz, University of California, Berkeley, have reported on confirming spectroscopy of 2007lu and 2007lw obtained on the Keck 10-m telescope on Oct. 14. J. Marriner, D. McGinnis (Fermilab), G. Miknaitis, A. Becker, J. Frieman, J. Holtzman, and A. Riess have reported on confirming spectroscopy of 2007lk and 2007lq obtained on the ARC 3.5-m telescope on the nights of Oct. 12 and 14. A. Aragon-Salamanca, University of Nottingham; M. Bremer, University of Bristol; M. Turatto, University of Padova; A. Goobar; R. Nichol; J. Sollerman; P. Ruiz-Lapuente, University of Barcelona; F. Castander, University of Barcelona; A. K. Romer, University of Sussex; C. Collins, Liverpool John Moores University; and J. Lucey and A. Edge, University of Durham, have reported on confirming spectroscopy that was obtained by the European Southern Observatory's New Technology Telescope on Oct. 14 and 15 by M. Smith and G. Leloudas for 2007lf, 2007lh, 2007lm, 2007lr, 2007ls, 2007me, 2007mf, 2007ml, 2007mk, 2007mn, 2007mo, and 2007mp. The discovery magnitudes tabulated below are all g magnitudes; spectroscopic redshifts are given in the column labelled z. Peak dates (all 2007) are approximate estimates either from fits to the early light curves or from the spectra, with a typical uncertainty of plus-or-minus several days; in cases where such estimates are either uncertain or very discrepant, they are not reported. Types marked with a question mark (?) imply that the type identification based on the spectrum is uncertain. SN Discov. R.A. (2000.0) Decl. Mag. z Estimated Type Date UT Peak Date 2007lf Sep. 3 0 16 45.46 + 1 12 03.2 20.5 0.04 July 20 Ia 2007lg Sep. 22 0 46 03.95 - 0 00 37.4 21.9 0.12 Oct. 7 Ia 2007lh Sep. 22 1 08 52.02 + 1 11 52.4 22.3 0.20 Oct. 5 Ia 2007li Sep. 22 1 13 04.01 - 0 32 24.0 21.4 0.12 Oct. 2 Ia 2007lj Sep. 30 21 28 41.93 - 0 04 02.1 20.6 0.04 Oct. 6 II 2007lk Oct. 3 1 57 50.11 - 0 23 53.2 21.0 0.22 Oct. 7 Ia? 2007ll Oct. 3 1 58 40.13 - 0 14 56.6 20.5 0.08 Oct. 4 II? 2007lm Oct. 3 3 13 40.44 + 0 37 47.9 21.4 0.21 Oct. 3 Ia 2007ln Oct. 3 3 40 43.21 + 1 00 11.0 21.8 0.09 Oct. 10 Ia? 2007lo Oct. 3 22 35 56.06 + 0 36 33.2 22.1 0.14 Oct. 10 Ia 2007lp Oct. 3 22 43 41.01 + 0 25 16.9 22.2 0.15 Oct. 17 Ia 2007lq Oct. 6 0 23 07.87 + 0 59 00.5 21.5 0.23 Oct. 15 Ia? 2007lr Oct. 6 0 49 00.34 - 0 19 26.4 22.1 0.15 Oct. 14 Ia 2007ls Oct. 6 20 28 28.07 + 0 00 22.4 21.7 0.25 Oct. 12 Ia 2007lt Oct. 6 21 53 47.34 + 0 00 54.2 19.9 0.12 Oct. 8 Ia 2007lu Oct. 6 22 01 34.90 - 0 15 24.8 22.3 0.32 Oct. 11 Ia 2007lv Oct. 6 23 24 47.98 + 0 56 40.4 20.5 0.12 Oct. 3 Ia? 2007lw Oct. 6 23 36 48.90 - 0 46 56.1 21.7 0.28 Oct. 9 Ia 2007lx Oct. 8 0 11 39.27 - 0 28 24.1 20.5 0.06 Oct. 10 II? 2007ly Oct. 8 0 22 53.38 + 0 46 33.4 20.1 0.08 Oct. 5 Ia 2007lz Oct. 8 0 31 23.21 + 0 19 08.1 21.0 0.09 Oct. 18 II 2007ma Oct. 8 0 44 53.75 - 0 59 49.3 19.1 0.11 Oct. 13 Ia 2007mb Oct. 8 0 50 11.36 + 0 40 31.5 21.1 0.19 Oct. 8 Ia 2007mc Oct. 8 1 07 25.28 + 1 02 37.5 20.8 0.15 Oct. 18 Ia 2007md Oct. 8 1 21 56.85 - 1 00 47.8 20.7 0.05 Oct. 14 Ic 2007me Oct. 8 1 41 03.75 - 0 26 54.5 21.1 – Oct. 18 Ia/Ic? 2007mf Oct. 8 1 58 55.14 - 1 01 37.5 21.3 0.20 Oct. 11 Ia 2007mg Oct. 8 3 06 33.83 + 0 47 35.9 21.1 0.16 Oct. 8 Ia 2007mh Oct. 8 3 14 31.77 + 0 16 11.4 19.9 0.13 Oct. 9 Ia 2007mi Oct. 8 3 23 31.52 + 0 39 60.0 19.9 0.13 Oct. 6 Ia 2007mj Oct. 8 3 34 44.44 + 0 21 19.9 20.4 0.12 Oct. 10 Ia 2007mk Oct. 8 23 56 17.33 - 0 30 21.1 22.1 0.18 Oct. 22 Ia 2007ml Oct. 9 0 31 53.46 + 0 08 17.9 21.8 0.20 Oct. 21 Ia 2007mm Oct. 9 1 05 46.67 - 0 45 31.8 21.1 0.07 Oct. 18 Ia 2007mn Oct. 9 2 05 03.96 + 0 10 28.4 21.9 0.08 Oct. 27 Ia 2007mo Oct. 9 22 11 33.85 + 0 45 53.2 21.7 0.24 Oct. 17 Ia 2007mp Oct. 12 21 16 35.63 - 0 46 11.6 21.5 0.06 – Ia SN 2007lx in MCG +00-1-36 looks quite well separated from the known BL Lac core of the galaxy and reasonably separated from a bright knot within the host galaxy, both of which have SDSS spectra and which look from the SDSS images like they may show some sign of variability at a lower level than is seen for 2007lx.